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  <body><table style="margin: 0 auto;"><tr><td><div class="topbar"><a href="AArch32-regindex.html">AArch32 Registers</a></div></td><td><div class="topbar"><a href="AArch64-regindex.html">AArch64 Registers</a></div></td><td><div class="topbar"><a href="AArch32-sysindex.html">AArch32 Instructions</a></div></td><td><div class="topbar"><a href="AArch64-sysindex.html">AArch64 Instructions</a></div></td><td><div class="topbar"><a href="enc_index.html">Index by Encoding</a></div></td><td><div class="topbar"><a href="ext_alpha_index.html">External Registers</a></div></td><td><div class="topbar"><a href="ext_enc_index.html">External Registers by Offset</a></div></td><td><div class="topbar"><a href="func_index.html">Registers by Functional Group</a></div></td><td><div class="topbar"><a href="notice.html">Proprietary Notice</a></div></td></tr></table><hr/><h1 class="register-section">GICC_DIR, CPU Interface Deactivate Interrupt Register</h1><p>The GICC_DIR characteristics are:</p><h2>Purpose</h2>
        <p>When interrupt priority drop is separated from interrupt deactivation, a write to this register deactivates the specified interrupt.</p>
      <h2>Configuration</h2><p>This register is present only when FEAT_GICv3_LEGACY is implemented. Otherwise, direct accesses to GICC_DIR are <span class="arm-defined-word">RES0</span>.</p><h2>Attributes</h2>
        <p>GICC_DIR is a 32-bit register.</p>
      <h2>Field descriptions</h2><table class="regdiagram"><thead><tr><td>31</td><td>30</td><td>29</td><td>28</td><td>27</td><td>26</td><td>25</td><td>24</td><td>23</td><td>22</td><td>21</td><td>20</td><td>19</td><td>18</td><td>17</td><td>16</td><td>15</td><td>14</td><td>13</td><td>12</td><td>11</td><td>10</td><td>9</td><td>8</td><td>7</td><td>6</td><td>5</td><td>4</td><td>3</td><td>2</td><td>1</td><td>0</td></tr></thead><tbody><tr class="firstrow"><td class="lr" colspan="8"><a href="#fieldset_0-31_24">RES0</a></td><td class="lr" colspan="24"><a href="#fieldset_0-23_0">INTID</a></td></tr></tbody></table><h4 id="fieldset_0-31_24">Bits [31:24]</h4><div class="field">
      <p>Reserved, <span class="arm-defined-word">RES0</span>.</p>
    </div><h4 id="fieldset_0-23_0">INTID, bits [23:0]</h4><div class="field"><p>The INTID of the signaled interrupt.</p>
<div class="note"><span class="note-header">Note</span><p>INTIDs 1020-1023 are reserved and convey additional information such as spurious interrupts.</p></div><p>When affinity routing is not enabled:</p>
<ul>
<li>Bits [23:13] are <span class="arm-defined-word">RES0</span>.
</li><li>For SGIs, bits [12:10] identify the CPU interface corresponding to the source PE. For all other interrupts these bits are <span class="arm-defined-word">RES0</span>.
</li></ul></div><h2>Accessing GICC_DIR</h2>
        <p>This register is used only when System register access is not enabled. When System register access is enabled:</p>

      
        <ul>
<li>For AArch32 implementations, <a href="AArch32-icc_dir.html">ICC_DIR</a> provides equivalent functionality.
</li><li>For AArch64 implementations, <a href="AArch64-icc_dir_el1.html">ICC_DIR_EL1</a> provides equivalent functionality.
</li></ul>

      
        <p>Writes to this register have an effect only in the following cases:</p>

      
        <ul>
<li>When <a href="ext-gicd_ctlr.html">GICD_CTLR</a>.DS == 1, if <a href="ext-gicc_ctlr.html">GICC_CTLR</a>.EOImode == 1.
</li><li>In GIC implementations that support two Security states:<ul>
<li>If the access is Secure and <a href="ext-gicc_ctlr.html">GICC_CTLR</a>.EOImodeS == 1.
</li><li>If the access is Non-secure and <a href="ext-gicc_ctlr.html">GICC_CTLR</a>.EOImodeNS == 1.
</li></ul>

</li></ul>

      
        <p>The following writes must be ignored:</p>

      
        <ul>
<li>Writes to this register when the corresponding EOImode field in <a href="ext-gicc_ctlr.html">GICC_CTLR</a> == 0. In systems that support system error generation, an implementation might generate a system error.
</li><li>Writes to this register when the corresponding EOImode field in <a href="ext-gicc_ctlr.html">GICC_CTLR</a> == 0 and the corresponding interrupt is not active. In systems that support system error generation, an implementation might generate a system error. In implementations using the GIC Stream Protocol Interface, these writes correspond to a Deactivate packet for an interrupt that is not active. For more information, see <span class="xref">'Deactivate (ICC)' in ARM® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0 (ARM IHI 0069)</span>.
</li></ul>

      
        <p>If the corresponding EOImode field in <a href="ext-gicc_ctlr.html">GICC_CTLR</a> is 1 and this register is written to without a corresponding write to <a href="ext-gicc_eoir.html">GICC_EOIR</a> or <a href="ext-gicc_aeoir.html">GICC_AEOIR</a>, the interrupt is deactivated but the bit corresponding to it in the active priorities registers remains set.</p>

      
        <p>When affinity routing is enabled for a Security state, it is a programming error to use memory-mapped registers to access the GIC.</p>
      <h4>GICC_DIR can be accessed through the memory-mapped interfaces:</h4><table class="info"><tr><th>Component</th><th>Offset</th><th>Instance</th></tr><tr><td>GIC CPU interface</td><td><span class="hexnumber">0x1000</span></td><td>GICC_DIR</td></tr></table><p>This interface is accessible as follows:</p><ul><li>When GICD_CTLR.DS == 0, accesses to this register are <span class="access_level">WO</span>.
          </li><li>When an access is Secure, accesses to this register are <span class="access_level">WO</span>.
          </li><li>When an access is Non-secure, accesses to this register are <span class="access_level">WO</span>.
          </li></ul><hr class="bottom_line"/><table style="margin: 0 auto;"><tr><td><div class="topbar"><a href="AArch32-regindex.html">AArch32 Registers</a></div></td><td><div class="topbar"><a href="AArch64-regindex.html">AArch64 Registers</a></div></td><td><div class="topbar"><a href="AArch32-sysindex.html">AArch32 Instructions</a></div></td><td><div class="topbar"><a href="AArch64-sysindex.html">AArch64 Instructions</a></div></td><td><div class="topbar"><a href="enc_index.html">Index by Encoding</a></div></td><td><div class="topbar"><a href="ext_alpha_index.html">External Registers</a></div></td><td><div class="topbar"><a href="ext_enc_index.html">External Registers by Offset</a></div></td><td><div class="topbar"><a href="func_index.html">Registers by Functional Group</a></div></td><td><div class="topbar"><a href="notice.html">Proprietary Notice</a></div></td></tr></table><p class="versions">30/03/2023 19:06; 997dd0cf3258cacf72aa7cf7a885f19a4758c3af</p><p class="copyconf">Copyright © 2010-2023 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.</p></body>
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